@charset "UTF-8";

:root {
  color-scheme: light;
  --ink: #171717;
  --muted: #666;
  --soft: #8b8b8b;
  --line: #e9e9e9;
  --paper: #fff;
  --wash: #fafafa;
  --font:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', sans-serif;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font: 15px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}
body:has(dialog[open]) {
  overflow: hidden;
}
button,
input {
  font: inherit;
}
button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
button,
summary {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
svg {
  flex-shrink: 0;
}
button {
  color: inherit;
}
button:disabled {
  cursor: default;
}
::selection {
  background: #171717;
  color: #fff;
}
:focus-visible {
  outline: 2px solid #006bdb;
  outline-offset: 5px;
  border-radius: 3px;
}
main:focus {
  outline: none;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  font-weight: 600;
  text-wrap: balance;
}
[hidden] {
  display: none !important;
}
.icon {
  display: inline-block;
  vertical-align: middle;
}
.mono {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: 16px;
  z-index: 100;
  padding: 10px 18px;
  background: var(--ink);
  color: white;
  transform: translateY(-150%);
}
.skip-link:focus {
  transform: none;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  white-space: nowrap;
  transition:
    background-color 0.18s,
    border-color 0.18s,
    box-shadow 0.18s;
}
.button .icon {
  width: 17px;
  height: 17px;
}
.button-primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
  box-shadow:
    0 1px 2px #00000014,
    inset 0 1px #ffffff22;
}
.button-primary:hover {
  background: #383838;
  border-color: #383838;
}
.button-secondary {
  background: var(--paper);
  color: var(--ink);
  border-color: #dedede;
  box-shadow: 0 1px 2px #00000006;
}
.button-secondary:hover {
  background: #f5f5f5;
  border-color: #c8c8c8;
}
.button-large {
  min-height: 50px;
  padding-inline: 24px;
  font-size: 15px;
}
.button-small {
  min-height: 36px;
  padding: 0 15px;
  font-size: 13px;
}
.button-small .button-arrow {
  display: none;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}
.text-link .icon {
  width: 17px;
  height: 17px;
  transition: transform 0.18s;
}
.text-link:hover .icon {
  transform: translateX(3px);
}
.text-link:hover {
  color: #565656;
}
.eyebrow {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  height: 72px;
  border-bottom: 1px solid var(--line);
  background: #ffffffed;
  backdrop-filter: blur(14px);
}
.header-inner {
  max-width: 1248px;
  height: 100%;
  padding: 0 32px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  font-size: 21px;
  font-weight: 650;
  letter-spacing: -0.06em;
  line-height: 1;
}
.brand img {
  width: 39px;
  height: 39px;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-right: auto;
  margin-left: 34px;
  color: var(--muted);
  font-size: 13px;
}
.desktop-nav a {
  padding: 14px 0;
}
.desktop-nav a:hover,
.desktop-nav [aria-current] {
  color: var(--ink);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}
.mobile-guide {
  display: none;
}
.page-frame {
  max-width: 1152px;
  margin: auto;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}
.grid-paper {
  position: relative;
  isolation: isolate;
}
.grid-paper::before {
  content: '';
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image:
    linear-gradient(to right, #ededed 1px, transparent 1px),
    linear-gradient(to bottom, #ededed 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(135deg, #00000080, transparent 42%, transparent 62%, #000000b3);
  pointer-events: none;
}
.hero {
  padding: 64px 48px 46px;
  text-align: center;
}
.hero::after {
  content: '+';
  position: absolute;
  left: -6px;
  top: 46px;
  color: #aaa;
  font: 20px/1 monospace;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 32px;
  padding: 0 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 12px;
  color: #555;
  box-shadow: 0 2px 3px #00000003;
}
.hero-label .icon {
  width: 15px;
  height: 15px;
}
.hero-label:hover {
  border-color: #b9b9b9;
}
.label-divider {
  width: 1px;
  height: 12px;
  margin-left: 2px;
  background: var(--line);
}
.hero h1 {
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.27;
  letter-spacing: -0.062em;
  margin-top: 26px;
  font-weight: 650;
}
.hero h1 > span {
  color: #737373;
}
.hero-description {
  margin: 24px auto 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}
.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.hero-notes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 23px;
  margin-top: 20px;
  font-size: 11px;
  color: #737373;
}
.hero-notes span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.hero-notes .icon {
  width: 13px;
  height: 13px;
}
.hero-console {
  display: grid;
  grid-template-columns: 1fr 194px;
  margin-top: 50px;
  border: 1px solid #dedede;
  background: #fff;
  border-radius: 9px;
  text-align: left;
  box-shadow:
    0 2px 3px #00000003,
    0 12px 38px #00000005;
  overflow: hidden;
}
.console-main {
  min-width: 0;
}
.console-top {
  padding: 13px 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
}
.console-top > span:first-child {
  display: flex;
  align-items: center;
  gap: 7px;
}
.console-top .icon {
  width: 16px;
  height: 16px;
}
.console-top .mono {
  color: #858585;
  font-size: 9px;
  letter-spacing: 0.03em;
}
.console-body {
  padding: 19px 24px 18px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  align-items: center;
}
.console-caption > .mono {
  font-size: 9px;
  color: #777;
  letter-spacing: 0.08em;
}
.diagnostic-number {
  font-family: 'Arial', sans-serif;
  font-size: 51px;
  font-weight: 550;
  line-height: 1.15;
  letter-spacing: -0.07em;
  margin-top: 5px;
}
.diagnostic-number > span {
  font: 14px var(--font);
  margin-left: 7px;
  letter-spacing: 0;
  color: #666;
}
.console-caption p {
  font-size: 10px;
  color: #888;
  margin-top: 7px;
}
.voiceprint {
  padding: 0 2px;
  color: #242424;
}
.voiceprint > svg {
  width: 100%;
  height: 88px;
  display: block;
}
.voiceprint-labels {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 8px;
  color: #8b8b8b;
  font-size: 9px;
}
.console-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 20px;
  border-top: 1px solid var(--line);
  color: #737373;
  font-size: 10px;
  gap: 8px;
}
.console-bottom > span,
.console-bottom a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.console-bottom .icon {
  width: 12px;
  height: 12px;
}
.status-dot {
  width: 5px;
  height: 5px;
  display: inline-block;
  border-radius: 100%;
  background: #258359;
}
.console-code {
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 19px;
  gap: 14px;
}
.console-code:hover {
  background: #fafafa;
}
.console-code img {
  width: 136px;
  height: 136px;
}
.console-code > span {
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 7px;
}
.console-code .icon {
  width: 14px;
  height: 14px;
}
.capability-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 23px;
  min-height: 68px;
  padding: 15px 24px;
  border-block: 1px solid var(--line);
  color: #646464;
  font-size: 12px;
}
.capability-strip > span:first-child {
  color: #939393;
  margin-right: 12px;
  font-size: 11px;
}
.capability-strip i {
  width: 3px;
  height: 3px;
  background: #bababa;
  border-radius: 50%;
}
.section-space {
  padding: 80px 48px;
  border-bottom: 1px solid var(--line);
}
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 35px;
}
.section-heading h2 {
  font-size: 34px;
  line-height: 1.4;
  letter-spacing: -0.045em;
}
.section-heading .eyebrow {
  margin-bottom: 14px;
}
.section-heading > p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.9;
  padding-bottom: 4px;
}
.section-heading > .text-link {
  padding-bottom: 4px;
  flex-shrink: 0;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
}
.feature {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 31px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-width: 0;
}
.feature-heading {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 11px;
  color: #727272;
}
.feature-heading .icon {
  width: 18px;
  height: 18px;
  color: #333;
}
.feature h3 {
  font-size: 23px;
  line-height: 1.45;
  letter-spacing: -0.035em;
  margin-top: 24px;
}
.feature p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
  margin-top: 13px;
}
.feature > .text-link {
  margin-top: auto;
  padding-top: 30px;
  font-size: 12px;
}
.feature-diagnosis {
  grid-column: span 2;
  background: linear-gradient(135deg, #fff 60%, #fafafa);
}
.feature-diagnosis h3 {
  font-size: 28px;
}
.phonetic-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  margin-top: 33px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}
.phonetic-board > div {
  padding: 22px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
}
.phonetic-board > div + div {
  border-left: 1px solid var(--line);
}
.phonetic-board .mono {
  font-size: 25px;
  letter-spacing: -0.07em;
}
.phonetic-board span:last-child {
  font-size: 10px;
  color: #858585;
}
.mock-flow {
  width: 100%;
  margin-top: 25px;
}
.mock-flow > div {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 0;
  font-size: 11px;
  border-bottom: 1px dashed #e4e4e4;
}
.mock-flow > div:last-child {
  border: 0;
}
.mock-flow > div > span:first-child {
  color: #999;
  font-family: monospace;
  font-size: 10px;
}
.mock-flow .icon {
  width: 13px;
  height: 13px;
  margin-left: auto;
  color: #888;
}
.feature-small {
  min-height: 251px;
}
.feature-small h3 {
  font-size: 19px;
}
.workflow {
  background: #fcfcfc;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.steps-grid article {
  position: relative;
  padding-top: 7px;
}
.steps-grid article:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 24px;
  left: 51px;
  right: -14px;
  border-top: 1px dashed #d9d9d9;
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid #ddd;
  border-radius: 50%;
  background: #fff;
  font-size: 11px;
}
.steps-grid h3 {
  font-size: 18px;
  margin-top: 24px;
  letter-spacing: -0.035em;
}
.steps-grid p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
  margin-top: 12px;
  max-width: 270px;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.guide-card {
  display: flex;
  flex-direction: column;
  padding: 23px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  transition:
    border-color 0.18s,
    background-color 0.18s;
}
.guide-card:hover {
  border-color: #bababa;
  background: #fcfcfc;
}
.guide-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.guide-category {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: var(--muted);
}
.guide-category .icon {
  width: 15px;
  height: 15px;
}
.guide-card-top > .mono {
  color: #929292;
  font-size: 10px;
}
.guide-card h3 {
  margin-top: 26px;
  font-size: 18px;
  line-height: 1.65;
  letter-spacing: -0.035em;
  text-wrap: initial;
}
.guide-card > p {
  margin-top: 14px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}
.guide-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 5px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 10px;
  color: #858585;
}
.guide-card-bottom .text-link {
  font-size: 11px;
  color: #333;
}
.guide-card-bottom .icon {
  width: 13px;
  height: 13px;
}
.faq {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 65px;
}
.faq-intro h2 {
  margin-top: 14px;
  font-size: 32px;
  line-height: 1.45;
  letter-spacing: -0.045em;
}
.faq-intro p {
  color: var(--muted);
  margin-top: 20px;
  font-size: 13px;
}
.faq-list details {
  border-bottom: 1px solid var(--line);
}
.faq-list details:first-child {
  border-top: 1px solid var(--line);
}
.faq-list summary {
  min-height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 17px 0;
  font-size: 13px;
  list-style: none;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list summary:hover {
  color: #777;
}
.faq-list summary .icon {
  width: 16px;
  height: 16px;
  color: #777;
  transition: transform 0.2s;
}
.faq-list details[open] summary .icon {
  transform: rotate(45deg);
}
.faq-list details p {
  font-size: 12px;
  line-height: 1.95;
  color: var(--muted);
  padding-bottom: 20px;
  padding-right: 26px;
}
.closing-cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  padding: 66px 72px;
  border-bottom: 1px solid var(--line);
}
.closing-cta h2 {
  font-size: 35px;
  line-height: 1.5;
  margin-top: 16px;
  letter-spacing: -0.045em;
}
.closing-cta p {
  margin-top: 15px;
  font-size: 13px;
  color: var(--muted);
}
.closing-cta .button {
  margin-top: 25px;
}
.closing-code {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 19px;
  flex-shrink: 0;
}
.closing-code img {
  width: 170px;
  height: 170px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px;
  background: white;
}
.closing-code > span {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  color: var(--muted);
}
.closing-code .icon {
  width: 13px;
  height: 13px;
}
.site-footer {
  max-width: 1152px;
  margin: auto;
  padding: 0 48px;
  border-inline: 1px solid var(--line);
  background: #fcfcfc;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0;
}
.footer-main .brand {
  font-size: 18px;
}
.footer-main .brand img {
  width: 33px;
  height: 33px;
}
.footer-main p {
  margin-top: 11px;
  color: #777;
  font-size: 11px;
}
.footer-column {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 9px;
  font-size: 11px;
}
.footer-column > span {
  color: #333;
  margin-bottom: 4px;
}
.footer-column a {
  color: #777;
}
.footer-column a:hover {
  color: #111;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 10px;
  color: #818181;
}
.qr-dialog {
  width: min(440px, calc(100% - 32px));
  padding: 0;
  max-height: calc(100dvh - 40px);
  border: 1px solid #e2e2e2;
  border-radius: 13px;
  color: var(--ink);
  background: #fff;
  box-shadow: 0 18px 80px #00000030;
}
.qr-dialog::backdrop {
  background: #00000070;
  backdrop-filter: blur(5px);
}
.dialog-content {
  position: relative;
  padding: 40px 35px 29px;
  text-align: center;
}
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 6px;
}
.icon-button:hover {
  background: #f4f4f4;
}
.dialog-close {
  position: absolute;
  right: 12px;
  top: 12px;
}
.dialog-close .icon {
  width: 16px;
  height: 16px;
}
.qr-dialog h2 {
  font-size: 27px;
  line-height: 1.45;
  letter-spacing: -0.04em;
  margin-top: 18px;
}
.qr-dialog #qr-description {
  font-size: 12px;
  color: #666;
  margin-top: 13px;
}
.qr-dialog .mini-code {
  width: 215px;
  height: 215px;
  margin: 24px auto;
}
.download-code {
  width: 100%;
}
.qr-help {
  font-size: 11px;
  color: #777;
  line-height: 1.9;
  margin-top: 17px;
}
.inner-hero {
  padding: 73px 48px 66px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
.inner-hero h1 {
  font-size: 49px;
  line-height: 1.35;
  letter-spacing: -0.055em;
  margin-top: 23px;
}
.inner-hero h1 span {
  color: #777;
}
.inner-hero p {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}
.library-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 25px;
  margin-bottom: 30px;
}
.library-heading h2 {
  font-size: 25px;
  letter-spacing: -0.035em;
}
.guide-search {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 13px;
  border: 1px solid #ddd;
  border-radius: 6px;
}
.guide-search .icon {
  width: 17px;
  height: 17px;
  color: #888;
}
.guide-search:focus-within {
  outline: 2px solid #006bdb;
  outline-offset: 3px;
}
.guide-search input {
  width: 225px;
  height: 42px;
  background: transparent;
  border: 0;
  color: var(--ink);
  outline: none;
  font-size: 13px;
}
.guide-library-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.guide-card-wide {
  padding: 30px;
}
.guide-card-wide h3 {
  font-size: 23px;
}
.guide-card-wide > p {
  font-size: 13px;
}
.search-status {
  color: #777;
  font-size: 12px;
  margin: -10px 0 25px;
}
.search-empty {
  text-align: center;
  padding: 50px 24px;
  border: 1px dashed #ddd;
}
.search-empty p {
  color: #777;
  margin-top: 12px;
  font-size: 13px;
}
.search-empty .button {
  margin-top: 25px;
}
.article {
  padding: 0 64px 64px;
}
.article-header {
  padding-top: 38px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 37px;
  color: #888;
  font-size: 11px;
}
.breadcrumbs a:hover {
  color: #111;
}
.article-header h1 {
  font-size: 39px;
  line-height: 1.5;
  letter-spacing: -0.04em;
  margin-top: 17px;
  max-width: 800px;
}
.article-subtitle {
  color: var(--muted);
  font-size: 17px;
  margin-top: 13px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  font-size: 10px;
  color: #888;
  margin-top: 25px;
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 225px;
  gap: 56px;
  padding-top: 37px;
}
.article-body {
  min-width: 0;
}
.article-body p,
.article-body li {
  font-size: 14px;
  color: #555;
  line-height: 2.05;
}
.article-lead {
  color: #444 !important;
  font-size: 15px !important;
}
.article-body section {
  margin-top: 38px;
  scroll-margin-top: 100px;
}
.article-body h2 {
  font-size: 23px;
  letter-spacing: -0.025em;
  margin-bottom: 17px;
  line-height: 1.5;
}
.article-body p + p {
  margin-top: 17px;
}
.article-body ol {
  padding-left: 22px;
  margin-block: 20px;
}
.article-body li {
  padding-left: 5px;
  margin-bottom: 10px;
}
.practice-example {
  padding: 23px 25px;
  background: #fafafa;
  border: 1px solid var(--line);
  border-left: 3px solid #343434;
  margin-top: 25px;
}
.practice-example .eyebrow {
  margin-bottom: 13px;
}
.practice-example p {
  font-size: 13px;
}
.article-sidebar {
  align-self: start;
  position: sticky;
  top: 107px;
}
.table-of-contents {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.table-of-contents > .eyebrow {
  margin-bottom: 4px;
}
.table-of-contents a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: #666;
  font-size: 11px;
  line-height: 1.8;
}
.table-of-contents .mono {
  color: #999;
  font-size: 9px;
}
.table-of-contents a:hover {
  color: #111;
}
.sidebar-qr {
  margin-top: 30px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  text-align: center;
}
.sidebar-qr img {
  width: 140px;
  height: 140px;
  margin: 0 auto 18px;
}
.sidebar-qr strong {
  font-size: 12px;
  font-weight: 500;
}
.sidebar-qr p {
  font-size: 10px;
  color: #777;
  margin-top: 4px;
}
.article-end {
  margin-top: 42px;
  padding: 28px;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.article-end h2 {
  font-size: 21px;
  margin-top: 15px;
  margin-bottom: 10px;
}
.article-end p {
  font-size: 12px;
}
.article-end .button {
  margin-top: 22px;
}
.related-guides {
  border-top: 1px solid var(--line);
}
.related-guides .section-heading h2 {
  font-size: 26px;
}
.start-page {
  min-height: 665px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
  align-items: center;
  padding: 70px 70px;
  border-bottom: 1px solid var(--line);
}
.start-copy h1 {
  font-size: 43px;
  line-height: 1.4;
  letter-spacing: -0.05em;
  margin-top: 22px;
}
.start-copy > p {
  margin-top: 22px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}
.start-steps {
  list-style: none;
  margin: 33px 0;
  padding: 0;
}
.start-steps li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-top: 16px;
  font-size: 12px;
  color: #666;
}
.start-steps .mono {
  color: #999;
  font-size: 10px;
}
.start-code {
  text-align: center;
}
.code-card {
  padding: 28px;
  border: 1px solid #dedede;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 8px 35px #00000004;
}
.code-card .mini-code {
  width: 244px;
  height: auto;
  margin: auto;
}
.code-card h2 {
  font-size: 23px;
  margin-top: 25px;
}
.code-card p {
  font-size: 11px;
  color: #777;
  margin-top: 5px;
}
.code-card .button {
  margin-top: 24px;
  width: 100%;
  font-size: 12px;
}
.start-code-note {
  display: block;
  margin-top: 18px;
  color: #888;
  font-size: 11px;
}
.help-section {
  padding: 42px 70px;
}
.help-section h2 {
  font-size: 22px;
}
.help-section p {
  max-width: 650px;
  font-size: 13px;
  color: #666;
  margin: 15px 0;
}
.not-found {
  min-height: 65vh;
  padding: 110px 30px;
  text-align: center;
}
.not-found > .mono {
  color: #777;
  font-size: 12px;
}
.not-found h1 {
  font-size: 38px;
  letter-spacing: -0.045em;
  margin-top: 24px;
}
.not-found p {
  color: #777;
  margin-top: 22px;
  font-size: 14px;
}

@media (min-width: 1500px) {
  .hero {
    padding-top: 82px;
    padding-bottom: 60px;
  }
  .hero h1 {
    font-size: 74px;
  }
}

@media (max-width: 1020px) {
  .page-frame,
  .site-footer {
    margin-inline: 28px;
  }
  .header-inner {
    padding-inline: 28px;
  }
  .desktop-nav {
    margin-left: 12px;
    gap: 21px;
  }
  .hero {
    padding-inline: 30px;
  }
  .hero h1 {
    font-size: 59px;
  }
  .console-body {
    grid-template-columns: 147px 1fr;
    gap: 15px;
  }
  .console-top .mono {
    display: none;
  }
  .section-space {
    padding: 62px 30px;
  }
  .section-heading h2 {
    font-size: 30px;
  }
  .feature {
    padding: 24px;
  }
  .feature h3 {
    font-size: 21px;
  }
  .feature-small h3 {
    font-size: 17px;
  }
  .phonetic-board .mono {
    font-size: 21px;
  }
  .guide-card {
    padding: 21px;
  }
  .guide-card h3 {
    font-size: 17px;
  }
  .guide-card-bottom {
    flex-wrap: wrap;
    gap: 7px;
  }
  .faq {
    gap: 35px;
    grid-template-columns: 1fr 1.4fr;
  }
  .closing-cta {
    padding: 55px 38px;
  }
  .closing-cta h2 {
    font-size: 30px;
  }
  .site-footer {
    padding-inline: 30px;
  }
  .article {
    padding-inline: 36px;
  }
  .article-layout {
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 30px;
  }
  .article-header h1 {
    font-size: 33px;
  }
  .sidebar-qr {
    padding: 14px;
  }
  .start-page {
    padding: 65px 38px;
    gap: 35px;
    grid-template-columns: 1fr 280px;
  }
  .start-copy h1 {
    font-size: 36px;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 78px;
  }
  .site-header {
    height: 64px;
  }
  .header-inner {
    padding-inline: 20px;
    gap: 12px;
  }
  .brand {
    font-size: 19px;
    gap: 6px;
  }
  .brand img {
    width: 33px;
    height: 33px;
  }
  .desktop-nav {
    display: none;
  }
  .mobile-guide {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    font-size: 12px;
    color: #666;
  }
  .header-actions {
    gap: 18px;
  }
  .button-small {
    min-height: 44px;
    padding-inline: 12px;
    font-size: 12px;
    gap: 6px;
  }
  .button-small .icon {
    width: 14px;
    height: 14px;
  }
  .page-frame,
  .site-footer {
    margin-inline: 16px;
  }
  .hero {
    padding: 48px 22px 30px;
  }
  .hero h1 {
    font-size: clamp(33px, 6.9vw, 52px);
    margin-top: 24px;
    line-height: 1.35;
  }
  .hero-description {
    font-size: 13px;
    margin-top: 21px;
    line-height: 1.9;
    max-width: 410px;
  }
  .desktop-break {
    display: none;
  }
  .hero-actions {
    margin-top: 24px;
    gap: 10px;
  }
  .button-large {
    padding-inline: 17px;
    min-height: 46px;
    font-size: 13px;
  }
  .button-large .button-arrow {
    display: none;
  }
  .hero-notes {
    gap: 13px;
    font-size: 10px;
    margin-top: 19px;
  }
  .hero-console {
    margin-top: 36px;
    grid-template-columns: minmax(0, 1fr) 150px;
  }
  .console-top {
    padding: 11px 14px;
  }
  .console-body {
    padding: 18px 15px;
    grid-template-columns: 100px 1fr;
    gap: 10px;
  }
  .console-caption > .mono {
    font-size: 7px;
  }
  .diagnostic-number {
    font-size: 42px;
  }
  .console-caption p {
    font-size: 8px;
  }
  .voiceprint-labels {
    display: none;
  }
  .console-bottom {
    padding: 8px 13px;
  }
  .console-bottom a {
    display: none;
  }
  .console-code {
    padding: 15px;
    gap: 11px;
  }
  .console-code img {
    width: 113px;
    height: 113px;
  }
  .console-code > span {
    font-size: 10px;
  }
  .capability-strip {
    gap: 17px;
    font-size: 11px;
    padding: 20px 15px;
  }
  .capability-strip > span:first-child {
    width: 100%;
    text-align: center;
    margin: 0;
    font-size: 10px;
  }
  .section-space {
    padding: 48px 24px;
  }
  .section-heading {
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 27px;
    flex-direction: column;
  }
  .section-heading h2 {
    font-size: 27px;
  }
  .section-heading > p {
    font-size: 12px;
  }
  .section-heading .eyebrow {
    margin-bottom: 11px;
  }
  .section-heading > .text-link {
    font-size: 12px;
  }
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
  .feature-diagnosis {
    grid-column: span 2;
  }
  .feature-simulation {
    grid-column: span 2;
  }
  .feature-small:last-child {
    grid-column: span 2;
  }
  .feature {
    padding: 24px;
  }
  .feature h3 {
    font-size: 23px;
    margin-top: 20px;
  }
  .feature-simulation h3 br {
    display: none;
  }
  .feature p {
    font-size: 12px;
  }
  .feature-small {
    min-height: 250px;
  }
  .feature-small h3 {
    font-size: 18px;
  }
  .feature-small:last-child {
    min-height: 214px;
  }
  .feature > .text-link {
    padding-top: 23px;
  }
  .steps-grid {
    gap: 25px;
  }
  .steps-grid h3 {
    font-size: 16px;
  }
  .steps-grid p {
    font-size: 11px;
  }
  .guide-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .guide-card {
    padding: 25px;
  }
  .guide-card h3 {
    margin-top: 21px;
    font-size: 20px;
  }
  .guide-card > p {
    font-size: 12px;
    margin-bottom: 23px;
  }
  .guide-card-bottom {
    flex-wrap: nowrap;
  }
  .faq {
    grid-template-columns: 1fr;
    gap: 29px;
  }
  .faq-intro h2 {
    font-size: 27px;
  }
  .faq-intro h2 br {
    display: none;
  }
  .faq-intro p {
    margin-top: 11px;
    font-size: 12px;
  }
  .closing-cta {
    padding: 43px 26px;
    gap: 25px;
  }
  .closing-cta h2 {
    font-size: 27px;
  }
  .closing-cta p {
    font-size: 12px;
  }
  .closing-code img {
    width: 135px;
    height: 135px;
  }
  .closing-code > span {
    font-size: 8px;
  }
  .closing-code .icon {
    display: none;
  }
  .closing-cta .button {
    font-size: 12px;
    padding-inline: 15px;
    gap: 8px;
  }
  .closing-cta .button-arrow {
    display: none;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 36px 0;
  }
  .footer-main > div:first-child {
    grid-column: span 2;
  }
  .footer-bottom {
    gap: 9px;
    font-size: 9px;
  }
  .footer-bottom span:nth-child(2) {
    order: 3;
    width: 100%;
  }
  .site-footer {
    padding-inline: 25px;
  }
  .inner-hero {
    padding: 52px 24px;
  }
  .inner-hero h1 {
    font-size: 37px;
  }
  .inner-hero .eyebrow {
    font-size: 10px;
  }
  .inner-hero p {
    font-size: 13px;
  }
  .library-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }
  .guide-search {
    width: 100%;
  }
  .guide-search input {
    width: 100%;
    font-size: 16px;
  }
  .guide-library-grid {
    grid-template-columns: 1fr;
  }
  .library-heading h2 {
    font-size: 24px;
  }
  .article {
    padding: 0 25px 44px;
  }
  .article-header {
    padding-top: 26px;
    padding-bottom: 27px;
  }
  .breadcrumbs {
    margin-bottom: 30px;
    gap: 9px;
    font-size: 10px;
  }
  .article-header h1 {
    font-size: 29px;
    line-height: 1.5;
    margin-top: 18px;
  }
  .article-subtitle {
    font-size: 14px;
  }
  .article-meta {
    gap: 13px;
    font-size: 9px;
  }
  .article-layout {
    grid-template-columns: 1fr;
    padding-top: 29px;
  }
  .article-sidebar {
    display: none;
  }
  .article-body h2 {
    font-size: 21px;
  }
  .article-body p,
  .article-body li {
    font-size: 14px;
  }
  .practice-example {
    padding: 21px;
  }
  .practice-example p {
    font-size: 12px;
  }
  .article-end {
    padding: 24px;
  }
  .article-end h2 {
    font-size: 20px;
  }
  .article-end p {
    font-size: 12px;
  }
  .related-guides .section-heading h2 {
    font-size: 23px;
  }
  .start-page {
    grid-template-columns: 1fr;
    padding: 48px 28px;
    gap: 40px;
  }
  .start-copy h1 {
    font-size: 36px;
  }
  .start-copy > .eyebrow {
    font-size: 9px;
  }
  .start-copy p {
    font-size: 13px;
  }
  .start-code {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }
  .help-section {
    padding: 36px 28px;
  }
  .not-found {
    padding: 80px 23px;
  }
  .not-found h1 {
    font-size: 29px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding-inline: 14px;
  }
  .brand {
    font-size: 17px;
  }
  .brand img {
    width: 30px;
    height: 30px;
  }
  .header-actions {
    gap: 13px;
  }
  .mobile-guide {
    font-size: 11px;
  }
  .button-small {
    min-height: 44px;
    padding-inline: 10px;
    font-size: 11px;
  }
  .page-frame,
  .site-footer {
    margin-inline: 12px;
  }
  .hero {
    padding-inline: 17px;
  }
  .hero-label {
    font-size: 10px;
    min-height: 30px;
  }
  .hero h1 {
    font-size: clamp(29px, 7.75vw, 36px);
    letter-spacing: -0.07em;
  }
  .hero-description {
    font-size: 12px;
  }
  .hero-actions {
    gap: 8px;
  }
  .button-large {
    min-height: 44px;
    font-size: 11px;
    padding-inline: 12px;
    gap: 7px;
  }
  .button-large .icon {
    width: 14px;
    height: 14px;
  }
  .hero-notes {
    gap: 10px;
    font-size: 8px;
  }
  .hero-notes .icon {
    width: 11px;
    height: 11px;
  }
  .hero-console {
    grid-template-columns: minmax(0, 1fr) 125px;
  }
  .console-top {
    font-size: 9px;
    padding: 10px;
  }
  .console-top .icon {
    width: 12px;
    height: 12px;
  }
  .console-top > span:first-child {
    gap: 5px;
  }
  .console-body {
    padding: 14px 12px;
    grid-template-columns: 1fr;
  }
  .console-caption > .mono {
    font-size: 7px;
  }
  .console-caption p {
    font-size: 8px;
  }
  .voiceprint {
    display: none;
  }
  .diagnostic-number {
    font-size: 39px;
  }
  .console-bottom {
    font-size: 8px;
    padding: 8px 10px;
  }
  .console-bottom > span {
    gap: 5px;
  }
  .console-code {
    padding: 13px 10px;
  }
  .console-code img {
    width: 104px;
    height: 104px;
  }
  .console-code > span {
    font-size: 9px;
    gap: 5px;
  }
  .console-code .icon {
    width: 12px;
    height: 12px;
  }
  .capability-strip {
    gap: 12px;
    font-size: 10px;
  }
  .section-space {
    padding: 43px 20px;
  }
  .section-heading h2 {
    font-size: 25px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .feature-diagnosis,
  .feature-simulation,
  .feature-small:last-child {
    grid-column: auto;
  }
  .feature-small,
  .feature-small:last-child {
    min-height: 216px;
  }
  .feature {
    padding: 23px;
  }
  .feature h3 {
    font-size: 21px;
  }
  .phonetic-board > div {
    padding: 20px 4px;
    gap: 10px;
  }
  .phonetic-board .mono {
    font-size: 17px;
  }
  .phonetic-board span:last-child {
    font-size: 8px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .steps-grid article {
    padding-left: 48px;
    padding-top: 0;
  }
  .step-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
  }
  .steps-grid article:not(:last-child)::after {
    left: 14px;
    right: auto;
    top: 38px;
    height: calc(100% - 12px);
    border-top: 0;
    border-left: 1px dashed #d9d9d9;
  }
  .steps-grid h3 {
    margin-top: 2px;
  }
  .steps-grid p {
    margin-top: 10px;
    max-width: none;
    font-size: 12px;
  }
  .closing-cta {
    padding: 43px 23px;
    flex-direction: column;
    text-align: center;
    gap: 32px;
  }
  .closing-cta h2 {
    font-size: 27px;
  }
  .closing-code {
    gap: 13px;
  }
  .closing-code img {
    width: 150px;
    height: 150px;
  }
  .closing-code > span {
    font-size: 10px;
  }
  .inner-hero h1 {
    font-size: 32px;
  }
  .guide-card h3 {
    font-size: 18px;
  }
  .article {
    padding-inline: 22px;
  }
  .article-header h1 {
    font-size: 26px;
  }
  .article-meta {
    row-gap: 6px;
  }
  .article-end {
    padding: 20px;
  }
  .article-end .button {
    font-size: 12px;
    padding-inline: 15px;
  }
  .start-copy h1 {
    font-size: 32px;
  }
  .start-page {
    padding-inline: 23px;
  }
  .start-steps li {
    font-size: 11px;
    gap: 10px;
  }
  .dialog-content {
    padding: 42px 25px 25px;
  }
  .dialog-close {
    width: 44px;
    height: 44px;
  }
  .qr-dialog h2 {
    font-size: 25px;
  }
  .qr-dialog .mini-code {
    width: 200px;
    height: 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}